Diamond certification is an International system created by the Gemological Institute of America (GIA) to evaluate the quality of a diamond based on the 4Cs—carat, colour, clarity, and cut.

Each white diamond of 0.3 ct or more comes with a GIA certificate showing detailed information of the stone.

For rings carrying smaller diamonds or multiple diamonds where the total weight is more than 0.3 ct but each stone weigh less than 0.3 ct, we will on request provide you with a Cornelia Webb testimonial letter stating the number of stones and carat in your ring, along with purchase date and price.